﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _71
{
    class Circle:Shape
    {
        public int radius { get; set; }
        public Circle(int a)
        {
            this.radius = a;
        }
        public override void GetArea()
        {
            base.GetArea();
            Console.WriteLine(radius*radius*3.14);
        }
    }
}
